Cooling device



March 25, 1930. F. E. DENNlsoN 1,751,623

COOLING DEVICE Filed Deo. 17, 1926 Patented Mar. 25, 1930 UNITED STATES pte FRENCH E. DENNISON, OF BELOIT, VISCNSIN, ASSIGNOR TO NATIONAL REFRIGERA- i TION CORPORATION, BELOIT, WISCONSIN, .A CORPORATION OF DELAWARE l ooonrive DEVICE Application flied December 1v, 192e. seriai No. 155,433.

' ter, the latter usually not being-used at night.

In soda fountains particularly, one of the greatest troubles is the danger of freezing the water when the demand is slightand the necessity at the same time for being able totalre care of a sudden increase in'demand.

It is accordingly an obj ect of this invention to provide an eiicient cooling unit which may be out outeither partly oi'- altogether to pre- Vent over cooling or freezing of a part of the system not in use without interfering with the rest of the system.

Itis also an object of this invention to provide sucha unit which vcan take care of a sudden fluctuation in demand without danger of freezing when the demand is slight and at the saine time having sufficient capacity to take care of peak loads.

Other and further obj ects of this invent-ion will be apparent from an examination of the specification and claims in connection with the accompanying drawings wherein,

Fig. 1 represents a fragmentary longitudinal sectional view of a portion of a coolingsystem showing a unit thereof.

same with parts removed.

Referring to the drawings,numeral 3 represents a cooling water compartment containing water which may be the drinking waterV itself or merely the medium by which the drinking water is cooled, the latter in such a case might be circulated through coils immersed in the water in the said compartment.

Submerged beneath the water within the compartment 3 is a horizontal double wall cylinder 4 including an outer cylinder 5 and an inner cylinder 6, the two cylinders 5 and 6 forming a thin refrigerant chamber 7 adapted to receive a refrigerant in the form of a gas and serves as a heat transfer unit. The

chamber 7 is very thin and has a maximum of is adapted to be screwed up or down by a hanaway from its seat, the portion 23 correspondconducting area in proportion to its volume so that it may cool the water in the compartment 3 very rapidly when the refrigerant is circulating therethrough. The ends of the chamber 7 are sealed as by welding the respective corresponding ends of the cylinders 5 and 6 together. The cylinder 4 surrounds a section V8 of a refrigerant line leading from the low pressure sideiof a mechanical refrigerating apparatus. The section 8 is provided with detachable couplings 9 and 10 for re-V 11 in the low pressure side, terminals 12-and 13 of which project into the compartment 3 from opposite walls respectively` thereof.

lThe refrigerant normally circulates in the form of an expanded and therefore cold gas throughthe line in the direction from the terminal `12to the terminal 13. A valve cas,- ing 14 is interposed in the section 8 between the coupling 9 and the middle of said section.

`A T-coniiectioii 15 is likewise interposed in the section 8 between the middle thereof and the coupling 10. This connection is connected by `pipe 16 to an upper portion of the chamber 7, while the lower end 17 of the valve casing 14 is connected to the bottom of said chamber. A valve stem 18 in the housing 14 carries a valve disk 19 at itsl lower end and dleA 21 to vary the admission of therefriger` ant from the line 11 tothe chamber 7, a passage 22 in thehousing 1.4 establishing com- Fig. 2 is a fragmentary plan view of the munication between said' line and valve. The stem 18 isv provided with vertically spaced threaded portions 28 oneither side o f a diametricallyreduced portion 24. Y When the disk 19 isseated, the refrigerant will How directly through the casing but as the disk is moved ingly shuts off direct ilow through the casing and'permits inward flow of refrigerant into theV chamber 7 with consequent cooling ei'ect.

`When the valve 1 9 is closed, the refrigerant passes practically unrestrictedly around the@ portion 24 through the section 8 without circulating through the chamber 7.. v

The cylinder 4 is provided with. a recess 25 extending from its right hand edge to facilitate assembly and dispose the valve handler:

. movably connecting it in the refrigerantline lo" `that when the valve 19 is closed, the refriger- Vant flowing in the said line will have no effect upon the water in the said compartment. Y

It will be apparent that when it is not desired to utilize the chamber 7 to cool the water in the compartment 3, the portion of the pipe 8 which extends between the housvas ing 14 and the T connection 15 may be used as a by-pass to shunt all of the refrigerant vinstead of permitting any of it tol circulate past the valve 19 into said chamber and out through the pipe 16.

It will be obvious that a suitable eXpansion valve might be used in place of the valve 14 and the chamber 7 utilized as an eXpansion chamber.

I am aware that many changes may be made without departing from the principles of this invention and I therefore do notwish tobe limited to the details shownA or described.

I claim:

1. A refrigerating unit adapted tol be inL serted-in'a refrigerant line, comprising a `cooling receptacle adapted to receive the refrigerant and be operatively associated with a compartment for cooling the same, means for circulating the refrigerant through said Y receptacle and means 1n the compartment and insulated from the same for by-passing said refrigerant past said receptacle. -V

2. A refrigerating unit adapted to be inserted in a refrigerant line, comprising a double walled cylinder, the two walls thereof forming a chamber therebetween adapted to receive the refrigerant, means for circulating a refrigerant through saidV chamber, means extending longitudinally through said cylinder for by-passing said refrigerant past said chamber, and means for insulating said by-passing means from said receptacle.

3. The combination with a line containing a refrigerant, of a double walled cylinder surrounding said line, the two walls of saidV cylinder forming a chamber therebetween, and means for adjustably admitting refrigerant from said line to said chamber and permitting the How of some of the refrigerant v.past said chamber even when admitting some of said refrigerant to the chamber. 4. The combination with a compartment adapted to contain a liquid to be cooled, of a receptacle in said compartment adapted to be immersed in said liquid, said receptacle being Y in the form of a double walled cylinder, the

past said chamber and means for insulating said last means from said liquid.

6. A liquid cooling device comprising, a

hollow cylindrical heat transfer unit adapted to be submerged in the liquid to be cooled,

a pipe extending longitudinally through said unit, and adapted to be interposed in a refrigerating line, and means whereby any desiredY portion of the refrigerant flowing through said line may be directed into said unit to cool the same.

71A liquid cooling device comprising a hollow cylindrical heat transfer 'unit adapted to be submerged in the liquid to-be cooled, a pipe extending longitudinally through said unit and adapted to be interposed in a refrigerating line, and a valve in said line for controlling the iow of refrigerant,the body of said valve being substantially within said unit and the handle projecting outside.

In witness of the foregoing I aiiiX my signature.

, FRENCH E. DENNISON. 

